The amount of Weight Watchers points allowed is determined by weight, height, age, gender and activity level. A 6-foot tall, 225 pound male who is 40 years old and works a desk job, for example, would have 47 points according to the Weight Watchers Point Calculator at Calculator.net.
If you change the details to a 40-year-old female with the same job, but she is 5 feet 5 inches tall and 225 pounds, she would have only 33 points. This is to account for metabolic differences based on the changes in height and gender. This is a large disparity, and those using Weight Watcher's point system should be sure to calculate what is an appropriate point allowance for their demographics.